package com.aefan.springcloud.alibaba.controller;

import com.aefan.springcloud.alibaba.service.PaymentService;
import com.aefan.springcloud.entities.CommonResult;
import com.aefan.springcloud.entities.Payment;
import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @Author: jxl
 * @Date: 2021/9/21 上午10:15
 */
@RestController
@Slf4j
public class CircleBreakerController {

    public static final String SERVICE_URL = "http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/fallback/{id}")
//    @SentinelResource(value = "fallback")   // 没有配置
//    @SentinelResource(value = "fallback", fallback = "handlerFallback")   // fallback只负责业务异常
//    @SentinelResource(value = "fallback", blockHandler = "blockHandler")   // blockHandler只负责sentinel控制台配置违规
//    @SentinelResource(value = "fallback", fallback = "handlerFallback", blockHandler = "blockHandler")   // blockHandler只负责sentinel控制台配置违规
    @SentinelResource(value = "fallback", fallback = "handlerFallback", blockHandler = "blockHandler", exceptionsToIgnore = IllegalArgumentException.class)   // 该异常不再有fallback方法兜底，没有降级效果
    public CommonResult<Payment> fallback(@PathVariable("id") Long id) {
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/" + id, CommonResult.class, id);
        if (id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException，非法参数异常。。。。");
        } else if (result.getData() == null) {
            throw new NullPointerException("NullPointerException，该ID没有对应的记录，空指针异常");
        }
        return result;
    }

    public CommonResult handlerFallback(@PathVariable("id") Long id, Throwable e) {
        Payment payment = new Payment(id, null);
        return new CommonResult(444, "兜底异常handlerFallback，exception内容   " + e.getMessage(), payment);
    }

    public CommonResult blockHandler(@PathVariable("id") Long id, BlockException blockException) {
        Payment payment = new Payment(id, null);
        return new CommonResult(445, "blockHandler-sentinel限流，无此流水：blockException内容 " + blockException.getMessage(), payment);
    }


    //---------------OpenFegin
    @Resource
    private PaymentService paymentService;
    @GetMapping("/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id")Long id){
        return paymentService.paymentSQL(id);
    }


}
